TM 10-3930-671-24 Table 2-2.  Unit Troubleshooting Procedures - CONT. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION ELECTRICAL SYSTEM (CONT.) 40. SEAT BELT WARNING LIGHT DOES NOT OPERATE - CONT. Step 3. Check continuity across timed buzzer relay (TB ORD 650). If timed buzzer relay has no continuity, replace relay (Para 3-22). If timed buzzer relay has continuity, wire harness faulty.  Notify DS/GS maintenance. 41. SEAT BELT BUZZER DOES NOT OPERATE. Check continuity across timed buzzer relay (TB ORD 650). If timed buzzer relay has no continuity, replace relay (Para 3-22). If timed buzzer relay has continuity, wire harness faulty.  Notify DS/GS maintenance. 42. TAILLIGHT DOES NOT OPERATE. Step 1. Check continuity across taillight lamp (TB ORD 650). If taillight lamp has no continuity, replace lamp (Para 3-22). If taillight lamp has continuity, go to step 2. Step 2. Check continuity across option fuse (TB ORD 650). If option fuse has no continuity, replace option fuse (Para 3-22). If option fuse has continuity, wire harness faulty.  Notify DS/GS maintenance. 43. BRAKE LIGHT DOES NOT OPERATE. Step 1. Check continuity across brake light lamp (TB ORD 650). If brake light lamp has no continuity, replace lamp (Para 3-22). If brake light lamp has continuity, go to step 2. 2-27